rcmconstruction.com

Valid Email Server
Domain Lookup › rcmconstruction.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rcmconstruction.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 09:43:46 UTC · ↺ Refresh

MX Hostnames

  • mx1.biz.rr.com
  • rcmconstruction-com.mail.protection.outlook.com
  • mx2.biz.rr.com

MX Priorities

  • mx2.biz.rr.com: 99
  • mx1.biz.rr.com: 99
  • rcmconstruction-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 74.208.236.34
  • 2607:f1c0:100f:f000::200

Mail Server IPs

  • 47.43.26.68 ↩ p-bc5-iedge-2-vip.rr.com.msg.pkvw.co.charter.net
  • 47.43.26.67 ↩ p-bc5-iedge-vip.rr.com.msg.pkvw.co.charter.net
  • 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
  • 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
  • 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
  • 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA ns1121.ui-dns.biz hostmaster.1and1.com 2017040532 28800 7200 604800 300
Primary NS (mname)
ns1121.ui-dns.biz
Admin Email (rname)
hostmaster@1and1.com
Serial
2017040532
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1121.ui-dns.biz
ns1121.ui-dns.com
ns1121.ui-dns.org
ns1121.ui-dns.de

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:mx1.biz.rr.com include:mx2.biz.rr.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

2 records
  • SPFv=spf1 include:spf.protection.outlook.com include:mx1.biz.rr.com include:mx2.biz.rr.com -all
  • v=verifydomain MS=8470315
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